Spatially resolved mid-infrared imaging of the SR 21 transition disk

J. A. Eisner, J. D. Monnier, P. Tuthill, S. Lacour

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


We present mid-infrared (mid-IR) observations from Gemini /TReCS that spatially resolve the dust emission around SR 21. The protoplanetary disk around SR 21 is believed to have a cleared gap extending from stellocentric radii of ∼0.5 AU to ∼20 AU, based on modeling of the observed spectral energy distribution (SED). Our new observations resolve the dust emission, and our data are inconsistent with the previous model. We require the disk to be completely cleared within ∼10 AU, without the hot inner disk spanning ∼0.25-0.5 AU posited previously. To fit the SED and mid-IR imaging data together, we propose a disk model with a large inner hole, but with a warm companion - possibly surrounded by circumstellar material of its own - residing near the outer edge of the cleared region. We also discuss a model with a narrow ring included in a large cleared inner disk region, and argue that it is difficult to reconcile with the data.

Original languageEnglish (US)
Pages (from-to)L169-L173
JournalAstrophysical Journal
Issue number2
StatePublished - Jun 20 2009


  • Circumstellar matter
  • Stars: individual (SR 21)
  • Stars: pre-main sequence
  • Techniques: high angular resolution
  • Techniques: interferometric

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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